quasar | 3c5d4007aabc7835b586d15313645af2e823dfad1d487cad46453dc3474e2693

Analysis

max time kernel
51s
max time network
57s
platform
windows7_x64
resource
win7-20250207-en
resource tags

arch:x64arch:x86image:win7-20250207-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 20:17

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General

Target

85d0793219eb0fac73bf85eade28e6ed1d676ec16ff8c01eacf13994f3267896.exe
Size

502KB
MD5

30a029d32d632ebd5938260e3e941c12
SHA1

26ee839be698c18d24becfc0102400435ccf039b
SHA256

85d0793219eb0fac73bf85eade28e6ed1d676ec16ff8c01eacf13994f3267896
SHA512

e0cc40d1615485ada96eb3958a07ddee5e1ce895036437403fbd898682b29fb5a7d35d958abecad23ea5f97bc8e8ef6492ce4563811e318254594243afd608ee
SSDEEP

6144:kTEgdc0YkXAGbgiIN2RSBEnxEkmf5MNJO5Etqi+yw4lUcEgOb8F9WwQAZD8GcTRi:kTEgdfYubgAxEk3P4rywVwpvQm5cdy

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

free.svipss.top:37263

Mutex

499e1307-c938-406c-8031-c021ba04640f

Attributes

encryption_key
4111EB4E3452F3046C6F5DFE90F84F08D3E1BB9C
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 3 IoCs

resource	yara_rule
behavioral15/memory/2412-1-0x0000000001090000-0x0000000001114000-memory.dmp	family_quasar
behavioral15/files/0x000600000001745b-5.dat	family_quasar
behavioral15/memory/2508-8-0x0000000000E80000-0x0000000000F04000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2508	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2412	85d0793219eb0fac73bf85eade28e6ed1d676ec16ff8c01eacf13994f3267896.exe
Token: SeDebugPrivilege	2508	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2508	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2508	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2412 wrote to memory of 2508	2412	85d0793219eb0fac73bf85eade28e6ed1d676ec16ff8c01eacf13994f3267896.exe	30
PID 2412 wrote to memory of 2508	2412	85d0793219eb0fac73bf85eade28e6ed1d676ec16ff8c01eacf13994f3267896.exe	30
PID 2412 wrote to memory of 2508	2412	85d0793219eb0fac73bf85eade28e6ed1d676ec16ff8c01eacf13994f3267896.exe	30

C:\Users\Admin\AppData\Local\Temp\85d0793219eb0fac73bf85eade28e6ed1d676ec16ff8c01eacf13994f3267896.exe
"C:\Users\Admin\AppData\Local\Temp\85d0793219eb0fac73bf85eade28e6ed1d676ec16ff8c01eacf13994f3267896.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2412
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2508

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
502KB

MD5
30a029d32d632ebd5938260e3e941c12

SHA1
26ee839be698c18d24becfc0102400435ccf039b

SHA256
85d0793219eb0fac73bf85eade28e6ed1d676ec16ff8c01eacf13994f3267896

SHA512
e0cc40d1615485ada96eb3958a07ddee5e1ce895036437403fbd898682b29fb5a7d35d958abecad23ea5f97bc8e8ef6492ce4563811e318254594243afd608ee

Download Submit
memory/2412-0-0x000007FEF5673000-0x000007FEF5674000-memory.dmp

Filesize
4KB

Download
memory/2412-1-0x0000000001090000-0x0000000001114000-memory.dmp

Filesize
528KB

Download
memory/2412-2-0x000007FEF5670000-0x000007FEF605C000-memory.dmp

Filesize
9.9MB

Download
memory/2412-10-0x000007FEF5670000-0x000007FEF605C000-memory.dmp

Filesize
9.9MB

Download
memory/2508-7-0x000007FEF5670000-0x000007FEF605C000-memory.dmp

Filesize
9.9MB

Download
memory/2508-8-0x0000000000E80000-0x0000000000F04000-memory.dmp

Filesize
528KB

Download
memory/2508-9-0x000007FEF5670000-0x000007FEF605C000-memory.dmp

Filesize
9.9MB

Download
memory/2508-11-0x000007FEF5670000-0x000007FEF605C000-memory.dmp

Filesize
9.9MB

Download